Pluto

noun

Plu·​to ˈplü-(ˌ)tō 

1

: the Greek god of the underworld compare dis

2

[New Latin] : a dwarf planet occupying an orbit that crosses the orbit of Neptune

Is Pluto a planet?: Usage Guide

In 2006 the International Astronomical Union defined planet in such a way as to exclude Pluto, reclassifying it instead as a dwarf planet. Although discussion of the matter continues, the change has been widely accepted.

Examples of Pluto in a Sentence

Recent Examples on the Web

Unlike Pluto retrograde and Mercury retrograde, which can appear to cause chaos in our lives, the upcoming Saturn retrograde will likely have different effects on you astrologically. —Kelsie Gibson, Peoplemag, 25 June 2024

The Moon in your sign is conjoining Pluto, which may increase your natural intensity. —Tarot.com, Orlando Sentinel, 24 June 2024

Hard Science Searching for Planet 9 Pluto failed to meet the definition of a planet, but some astronomers think there might be a legitimate Planet 9 out there. —Big Think, 24 June 2024

Previous seasons of The Challenge are available to stream on Paramount+, MTV VOD, and The Challenge channel on Pluto TV. —Glenn Garner, Deadline, 24 June 2024

Word History

Etymology

Latin Pluton-, Pluto, from Greek Ploutōn

First Known Use

14th century, in the meaning defined at sense 1

Kids Definition

Pluto

noun

Plu·​to ˈplüt-ō 

: a large object in the outermost part of the solar system that is often considered one of the planets see note at planet